398066 has 4 divisors (see below), whose sum is σ = 597102. Its totient is φ = 199032.

The previous prime is 398063. The next prime is 398077. The reversal of 398066 is 660893.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 366025 + 32041 = 605^2 + 179^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398066.

It is not an unprimeable number, because it can be changed into a prime (398063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99515 + ... + 99518.

2³⁹⁸⁰⁶⁶ is an apocalyptic number.

398066 is a deficient number, since it is larger than the sum of its proper divisors (199036).

398066 is a wasteful number, since it uses less digits than its factorization.

398066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199035.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 398066 is about 630.9247181717. The cubic root of 398066 is about 73.5616894586.

The spelling of 398066 in words is "three hundred ninety-eight thousand, sixty-six".